diff options
Diffstat (limited to 'lr.c')
| -rw-r--r-- | lr.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lr.c b/lr.c index 26c5888..1c8b228 100644 --- a/lr.c +++ b/lr.c @@ -414,17 +414,27 @@ parse_strcmp() char *s; if (parse_string(&s)) { + int r = 0; struct expr *e = mkexpr(op); e->a.prop = prop; if (op == EXPR_REGEX) { e->b.regex = malloc(sizeof (regex_t)); - regcomp(e->b.regex, s, REG_EXTENDED | REG_NOSUB); + r = regcomp(e->b.regex, s, REG_EXTENDED | REG_NOSUB); } else if (op == EXPR_REGEXI) { e->b.regex = malloc(sizeof (regex_t)); - regcomp(e->b.regex, s, REG_EXTENDED | REG_NOSUB | REG_ICASE); + r = regcomp(e->b.regex, s, REG_EXTENDED | REG_NOSUB | REG_ICASE); } else { e->b.string = s; } + + if (r != 0) { + char msg[256]; + regerror(r, e->b.regex, msg, sizeof msg); + fprintf(stderr, "%s: invalid regex '%s': %s\n", + argv0, s, msg); + exit(2); + } + return e; } |